Pumping jack



June 30, 1936. MAHA 2,046,274

' PUMPING JACK Filed March 12, 1952 INVENTOR .05. MW 7 W Patented June 30, 1936 PUMPING JACK Joseph B. Mahan, Toledo, Ohio, assignor to The National-Superior Company, Toledo, Ohio, at corporation of Delaware Application March 12, 1932, Serial No. 598,401

90laims.

'My invention relates to a pumping jack designed particularly for oil wells, but adaptable to other apparatus.

The principal object of this invention is to provide a pumping jack [with a supporting frame constructed to withstand severe usage. Another object is to provide for a walking beam a mounting which is adiustable to position the pump rod in alinement with the well hole or pump barrel after the frame has been set upon its foundation.

Referring to the accompanying drawing, Fig. l is a side elevation of a pumping jack containing my invention; Fig. 2, an end elevation of Fig. 1; Fig. 3, a plan view of a modification and showing thebearings, the trunnion, and the swivel plate T- bar, shown on an enlarged scale, the walking beam and its supporting frame being omitted; Fig. 4, a side elevation of Fig. 3, a portion being in section on the line 44 on Fig. 3; and Fig. 5, a plan view of the swivel plate T-bar.

Referring to the drawing, I designates horizontal base members spaced apart by the bolts '2. The inclinedmembers 3 are attached to the extreme ends of the horizontal members I and in the same plane thereof. The members 3 converge upwardly, forming with the-horizontal members I triangular frames to which are fastened the vertical web portions of the T-bars 4. The vertical members 5 are attached at their lower ends to the center of the horizontal members I and at 7 their lowerendsto the center of the horizontal members I and at their upper ends to the vertical web portions of the T-bars 4 between the converging members 3. The members 5 thus bisect the triangular frames made up of the members I and 3.

6 represents horizontal base members-extending outwardly from the center or the horizontal members I, terminating at the base of the inclined brace members I which converge toward the top of the triangular frames and are fastened to the vertical members 5 by means of the plates 8. Thus there is provided a pair of trihedral supporting frames having clearance between them and forming a portable unitary structure.

9 represents bearing housings which are supported on the horizontal flanges of the T-bars 4 and are clamped thereto by the bolts II whichpass through the horizontal flanges I4 of the housing 9 and thence through the enlarged holes II in the horizontal flanges on the T-bars 4.

' I 2 indicates bosses or blocks fastened on the opposite ends of the horizontal flanges oi the T- bars 4. These bosses are drilled and tapped horizontallv to receive the adjusting bolts I3 which abuttheflanges llofthehousinglandmaybe locked against the faces of the bosses by the lock nuts I5.

-I6 designates a horizontal shaft or trunnion supported by the bearing 9. The plate I'I carried by the trunnion I6 is bolted to the walking beam I8 near or about its center. The walking beam I8 is provided with the pendent member I9 and a diagonal member 20 which are connected together to form a triangular frame. Thelower portion of the member I9 has attached thereto the pull rod 2| designed to be connected to a suitable reciprocating power device forcausing vertical oscillation of the walking beam l8 on the shaft I6.

22 designates the, upper portion of the pump barrel containing the pump rod 23 which is sus- 1 pended by the links 24 that are in turn supported.

by the bearing 25 at one end of the walking beam I8. The bearingsii, as shown in Fig. 2, are separate .or' individual castings, each resting on its respective T-bar member 6 and held in spaced-apart relation by the spacing bolt 26.

Figs. 3 and 4 show the bearings 9' which are connected together by the web 21,. the bearing structure being in one piece. When the one-piece bearings are used, the spacing bolt 26 is not necessary' to space the supporting triangular frames at their apex as the web 21 is sufllcient to maintain a rigid structure when this bearing structurev 9 is clamped to the T-bars 4.

In order to accurately aline the pump rod 23.

coa'xially with the pump barrel 22 after the pump jack supporting frame has been fixed to its foundation, the bearing clamping bolts I0 are loosened and the four adjusting bolts I3 are-turned in their tapped holes in the bosses I2 so that they bear against the bearing flanges I4 and impart to the bearing structure and walking beam longitudinal or arcuate motion, or both, thus obtaining micrometer adjustment of the walking beam, enabiing the one making the adjustmentto accurately aline the pump rod coaxially with the pump bare re] 22. By tightening the bolts III the bearing structure may be clamped to the T-bars 4 and the frames positioned at either side of the vertical plane in which the beam is to swing, bearings to 5 receive said trunnions and movably mounted. on said supports, and screw threaded means to adjust the bearings relative to the supports to center the element in the well.

2. In a pumping jack for supporting a walking beam to operate an element suspended in a well, the combination of a pair or trihedral supporting frames positioned at either side of the vertical plane in which the beam is to swing, bearings to receive the trunnions and mounted on the frames, and screw threaded means to adjust the bearings relative t'o said frames to center theelement in the wll.

3. In a pumping jack for supporting a walking beam to operate an element suspended in a well, the combination with trunnions-extending from either side of the beam, of a pair of supporting frames positioned at either side of the vertical plane in which the beam is to swing, hearings to receive said trunnions and mounted on said supports, and abutment bolts to adjust the bearings relative to the supports to. center the element in the well.

4. A retractible walking-beam structure of the characterdescribed, including: a. Samson post; a walking-beam; means for pivotally securing said walking-beam to the upper part of said Samson I post, said securing means being movable relative movement.

relative to said support and thus adjust the walking beam to properly center it in operative position.

6. A bearing support for Samson posts comprising a. horizontal bearing plate connected rigidly with the post, a supporting plate adjustably mounted on the bearing plate and acting to support a rocker bearing, and means for shitting the supporting plate longitudinally in opposite directions, the same means also constituting means for adjusting-the supporting plate arcuately.

'7. A bearing support for Samson posts comprising a horizontal' bearing plate connected rigidly with the post. a supporting plate adjustably mounted on the bearing plate and acting to. support a rocker bearing, means for shifting thesupporting plate longitudinally in opposite directions, the said means also constituting means foradjusting the supporting plate arcuately, and means for lockingthe supporting 8. A bearing support iorSamson posts comprising a horizontal bearing surface in ilxed relation with the post, a rocker bearing'pnit adjustably mounted on the bearing surface, and screw means for shifting the bearing unit longitudinally in opposite directions, the said means also constituting means for adjusting the bearing unit arcuately.

9. A bearing'support ior Samson posts comprising a horizontal bearing surface in fixed relation with the post, a rocker bearing unit adjustably mounted on the bearing surface, screw means for shifting the bearing unit longitudinally in opposite directions, the said means also constituting means for adjusting the bearing unit arcuately, and means .for locking the rocker bearing unit against movement. p JOSEPH R. M AHAN.

plate against, 

